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It depends on the M16. If I remember right, the original had full auto A2 has burst and a different handgrip.

I'm prolly remembering wrong. but thanks for making me feel old.

The update is a welcome addition to the game. In regards to the weapon questions:
-The M16-A1 had a full auto and single shot setting on it, and a 5:1 ratio on the rifling, it was debuted in Vietnam. In Insurgency however, the weapon used is the M16-A4, which only comes with burst and single shot and has a 7:1 rifling, which increased the accuracy.
-There are some newly updated Marine M16 rifles, outfitted with Trijicon ACOG 4x scopes, they have been tweaked for accuracy and have the old style full-auto receivers. The Marines that carry these rifles are call "Guardian Angels" and they have the ability to engage targets out as far as 800-900 meters. The weapon system is designated the Mark-12 and I'd like to see it introduced, 1 per squad, to Insurgency for sure!
 
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Originally Posted by PIMP DADDY SMURF View Post
Would that still be an M16 though?Correct me if I'm wrong, but I thought M16's were only burst and single shot...
It depends on the M16. If I remember right, the original had full auto A2 has burst and a different handgrip.

I'm prolly remembering wrong. but thanks for making me feel old

The update is a welcome addition to the game. In regards to the weapon questions:
-The M16-A1 had a full auto and single shot setting on it, and a 5:1 ratio on the rifling, it was debuted in Vietnam. In Insurgency however, the weapon used is the M16-A4, which only comes with burst and single shot and has a 7:1 rifling, which increased the accuracy.

Close on all counts, but no cigar totally.

First, Eugene Stoner designed the AR-15 for the ArmaLite division of Fairchild, to what at the time were some impossible specifications: 7 lb rifle, capable of controllable full auto fire, higher capacity, without sacrificing accuracy or distance hitting.

There are those who say he succeeded, and those who say he did not. But whatever, the ultra-lightweight, aluminum and plastic, in-line bore, gas-impingment operated AR-15 was born and was tested along with other designs by the US military. It was adopted and the military version was named the M16. In its native configuration, the M16 was an assault rifle, a selective fire rifle in what was technically considered an intermediate cartridge (the .223 Remington, also known as the 5.56 NATO -- while the cartridges are technically different according to the NATO standard, the differences for this discussion are moot since we are discussing modes of fire and not cartridge casing configuration and/or performance).

The original M16's settings were Safe, Semi, Auto. It had no forward assist, no reinforcement where the lower receiver housed the end of the buffer, and no raised "fence" around the magazine release button. These modifications were all improvements that came later.

The original M16's barrel twist was 1:12, which barely stabilized the 55-grain projectiles, and gave the rifle a reputation for tumbling the bullets on impact -- an impressive feat, as the terminal ballistics on those rifles were rather frightening. It was during this time that the M16 gained the reputation of "killing like chain lightning."

Field trials didn't go so well, however. Both because Colt, who had purchased the rights to the M16 from Armalite, had oversold the weapon as "self cleaning" and thus, proper cleaning gear was not readily available to the troops, and because the US government in its infinite wisdom, chose to save 1.65 per rifle and NOT chrome line the barrel.

Now, I've been told that at the time (the early 1960's) there was no reliable way of chrome lining a barrel of that diameter (.22, basically), but that's hearsay as I have not yet verified this data. The rest is published elsewhere.

Field trials for the M16 were dismal, with the shortcomings of having no cleaning gear, stuck casings in the chamber, and other malfunctions were quickly turning the "wonder weapon" into a deathtrap. Modifications were made.

Interim modification rifles were called the XM-16E2, still with the Safe-Semi-Auto fire control group, but with a forward assist to theoretically prevent mischambering. To this day, I have never seen the forward assist have much utility, even in the rifles I build.

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2x
 
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I don't know exactly when they started chrome lining the barrels, whether it was with the M16A1, or the A2, but I know for a fact that all of the M16A2's had heavier barrels, chrome lining, reinforcement at the buffer retainer ring, a raised fence around the magazine release button, and knob-adjustable rear sights.

The A1 had the "pencil" barrel, which proved a bit fragile in training (bent during bayonet practice...eek!)

However, some A1's had the raised fence, some didn't -- Colt cranked 'em out however they could during the war.

Also, with the A2 came the barrel with the 1:7 twist, which was fast enough for the new NATO standard, the SS109, which is a 62-grain steel core projectile. The downside to this twist is that it OVER stabilized the rounds, so they no longer tumbled upon impact, thus the killing capability from the terminal ballistics standpoint was reduced.

The A1 still had safe-semi-auto. With the A2 came the burst mode. The M16A2's settings are safe-semi-burst. The burst is three shot, non-resetting, activated by a modification to the fire control group, specifically, the trigger (the channel made wider to accommodate two disconnectors), the disconnnectors (two thinner disconnectors instead of one thick one), and the hammer (a burst cam that looks like a sprocket was added to the right side).

By non-resetting, I mean that if you pull the trigger on an A2 and only fire two of the three shots in the burst, the next shot will be single, not another three shot burst.

This is because the bursting cam is attached to the hammer, and advances each time the hammer fires the weapon. The bursting cam has six "teeth" with four shallow "cuts" and two deep ones. The secondary disconnector, also known as the "double hook disconnector" has a hook that interacts with the hook on the hammer, the other hook interacts with the teeth of the bursting cam. The shallow cuts, when engaged by the secondary, keep the secondary from engaging the hammer (allowing the rifle to continue to cycle because the hammer drops), while the deep cuts allow the disconnector to engage the hook on the hammer, stopping the cycle (the end of the burst).

The production M4 also has this burst fire control system, whereas the M4A1 does not.

Also, the rifling on the Modern M16A2, M4, and even on most commercial AR-15's, is 1:9, which seems to be the best compromise (decided by other people smarter than me) for stabilizing the greatest range of projectile grain weights (From 55gr up to about 72gr, or so I'm told).

Nowadays, there are so many variants with so many designations based off the AR-15/M16 platform, I've stopped bothering to memorize them. I just build them how I feel like and play with them. Except I won't build one without a chrome-lined barrel unless it is a match rifle never intended for combat.

If I am wrong in any of these posts, please feel free to verify my information.

2x
 
PS:

For those in a combat zone, it IS possible to modify a burst-equipped rifle to the original Safe-Semi-Full configuration:

With the rifle open (or completely apart, with the upper separate from the lower, and you looking down into the lower and FCG from the top): simply by drifting the trigger pin from right to left (with the tip of a cartridge to start, then gently pulling with your fingers if it's loose enough) to the point where the secondary disconnector is released (sproing! -- it's under spring tension from the righthand disconnector spring) -- at this point, remove the secondary disconnector, and slide the trigger pin back into operating position. You may have to futz with the trigger a little to make things line up.

The downside to this method is that now there's a gap in the trigger area where the secondary disconnector used to be -- the trigger pin is hardened steel and the hole tolerances are good, but with constant use, the lateral forces of the primary disconnector flopping around in there will eventually wear it funny, gouging and weakening the trigger pin -- so this is NOT a permanent fix -- this is a "get me home" until you can find some nice armorer to trade you out an A1 FCG (Fire Control Group) for your M4 or A2 "burst" FCG.

Just FYI.

Caution: Don't remove the trigger pin completely-- it can be a major pain in the butt to put back in without tools. Been there, done that.

Sorry for the three-post thread hijack. I'll go back to just being a player now.

2x
 
I'll be back soon enough, finally saving up to get a new computer. I'm sad that I'm missing the fun.
 
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